/* $NetBSD: zero.c,v 1.1.1.2 2009/12/02 00:26:25 haad Exp $ */ /* * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. * * This file is part of LVM2. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU Lesser General Public License v.2.1. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "lib.h" #include "toolcontext.h" #include "segtype.h" #include "display.h" #include "text_export.h" #include "text_import.h" #include "config.h" #include "str_list.h" #include "targets.h" #include "lvm-string.h" #include "activate.h" #include "metadata.h" static const char *_zero_name(const struct lv_segment *seg) { return seg->segtype->name; } static int _zero_merge_segments(struct lv_segment *seg1, struct lv_segment *seg2) { seg1->len += seg2->len; seg1->area_len += seg2->area_len; return 1; } #ifdef DEVMAPPER_SUPPORT static int _zero_add_target_line(struct dev_manager *dm __attribute((unused)), struct dm_pool *mem __attribute((unused)), struct cmd_context *cmd __attribute((unused)), void **target_state __attribute((unused)), struct lv_segment *seg __attribute((unused)), struct dm_tree_node *node,uint64_t len, uint32_t *pvmove_mirror_count __attribute((unused))) { return dm_tree_node_add_zero_target(node, len); } static int _zero_target_present(struct cmd_context *cmd, const struct lv_segment *seg __attribute((unused)), unsigned *attributes __attribute((unused))) { static int _zero_checked = 0; static int _zero_present = 0; if (!_zero_checked) _zero_present = target_present(cmd, "zero", 1); _zero_checked = 1; return _zero_present; } #endif static int _zero_modules_needed(struct dm_pool *mem, const struct lv_segment *seg __attribute((unused)), struct dm_list *modules) { if (!str_list_add(mem, modules, "zero")) { log_error("zero module string list allocation failed"); return 0; } return 1; } static void _zero_destroy(const struct segment_type *segtype) { dm_free((void *) segtype); } static struct segtype_handler _zero_ops = { .name = _zero_name, .merge_segments = _zero_merge_segments, #ifdef DEVMAPPER_SUPPORT .add_target_line = _zero_add_target_line, .target_present = _zero_target_present, #endif .modules_needed = _zero_modules_needed, .destroy = _zero_destroy, }; struct segment_type *init_zero_segtype(struct cmd_context *cmd) { struct segment_type *segtype = dm_malloc(sizeof(*segtype)); if (!segtype) return_NULL; segtype->cmd = cmd; segtype->ops = &_zero_ops; segtype->name = "zero"; segtype->private = NULL; segtype->flags = SEG_CAN_SPLIT | SEG_VIRTUAL | SEG_CANNOT_BE_ZEROED; log_very_verbose("Initialised segtype: %s", segtype->name); return segtype; }